Features: Control light brightness, speed or temperature with ease using this Voltage Controller. Equipped with a powerful two way silicone controlled rectifier, this voltage regulator offer convenient and practical usage. Suitable for both large household and small industrial electrical appliances, this voltage regulator is perfect for those who need to regulate powers up to 4000W. Whether you need to adjust the speed of a fan or control the temperature of a motor, this voltage regulator is suitable for various applications. Experience the versatility and reliability of this voltage regulator in your home or workplace. Say goodbye to fluctuating voltages and enjoy stable performances. Specifications: Material:ABS Input Voltage: AC110V to 220V Power: 4000W(resistive load) Size: Approx.8.5x6x3.3cm/3.35x2.36x1.3inch Note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1xVoltage Controller